RISC-V: Fix one ICE for vect test vect-multitypes-5

There will be one ICE when build vect-multitypes-5.c similar as below:

riscv64-unknown-elf-gcc -O3 \
  -march=rv64imafdcv -mabi=lp64d -mcmodel=medlow \
  -fdiagnostics-plain-output -flto -ffat-lto-objects \
  --param riscv-autovec-preference=scalable -Wno-psabi \
  -ftree-vectorize -fno-tree-loop-distribute-patterns \
  -fno-vect-cost-model -fno-common -O2 -fdump-tree-vect-details \
  gcc/testsuite/gcc.dg/vect/vect-multitypes-5.c -o test.elf -lm

The below RTL is not well handled in riscv_legitimize_const_move, and
then fall through to the default pass. Then the
default force_const_mem will NULL_RTX, and will have ICE when operating
one the NULL_RTX.

(const:DI
  (plus:DI
    (symbol_ref:DI ("ic") [flags 0x2] <var_decl 0x7fe57740be10 ic>)
    (const_poly_int:DI [16, 16])))

This patch would like to take care of this rtl in riscv_legitimize_const_move.

Signed-off-by: Pan Li <pan2.li@intel.com>
Co-Authored-By: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>

gcc/ChangeLog:

	* config/riscv/riscv.cc (riscv_legitimize_poly_move): New declaration.
	(riscv_legitimize_const_move): Handle ref plus const poly.

0 files changed, 0 insertions, 0 deletions